TV trouble

wa8yxm: Beg your pardon. Wall plate does, in fact, have a light and a push button switch to turn it off and on. Light is lit, coax is connected but still no front tv channels (except one). Pardon me but still learning the finer points of the Class A. Still, what is 12vdc receptacle for, I wonder?

wa8yxm wrote:


First: A wall plate.. This plate has a 12 volt outlet, SWITCH, LIGHT and antenna connector,...

Wall plate has 12vdc female receptacle and ant coax male connector.. No lights and no switches. What is 12vdc receptacle for?

Ah, but my BOMB has no coax connectors for the TVs. RCA RGB plugs from the coach plug into the back of the BOMB (which is actually a Direct tv receiver) The receiver has two coax connectors - ANT and SAT. I am plugged into the ANT. The SAT is not activated.

Your box of many buttons does coax only...

It's very possible that the front TV is set to use HDMI, or RGB + LR RCA cables from the dish box.

Ours, the TV antenna, park cable jack, and an output off of the dish receiver are inputs to the box of many buttons, and send signals to all 3 TV's when TV is selected.

But the front TV is also wired with RCA's, R G B + L R, which go to the DVD player, and another set to the satellite box.

So the bedroom tv is always looking at it's coax input on channel 3.
But the front TV is not, it see's the "Bomb" when input is set to TV, the DVD when input is set to "input 2", and the satellite when input is set to "input 3"

newer moho's, with hdmi and such, may differ greatly.

Yeah, because I have tried the channel SCAN, made sure the TV setting is to AIR rather than the CABLE ,and because the rear TV works perfectly, I have swapped where the TVs connect to the antenna and the rear still works great but the front is the same, it seems the most likely is that the tuner at fault. Just seems odd that the TV will show one single channel perfectly but all others act as if there is no antenna connected. I have yet to try a park cable. Wonder if that will make any difference?

You could have one of several issues;

1. Antenna coax to Front TV is not connected or is damaged.

2. Front TV is set for A/V or Satellite-In rather than Antenna.

3. Front TV has tuner failure. Repair or replace.

Diagnose by insuring, via On-Screen Menus, that the front TV is set for Antenna, not Digital, or HDMI, or Video. If not, switch to Antenna and perform Scan.

Substitute a known good TV to see how it performs. If it works OK, suspect #3. If it has the same problem, suspect #1



Good Luck

Mike
Retired Electronics (TV) Tech and Consumer Electronics Service Business Owner.

Question: RVs have two or 3 different antenna systems.

First: A wall plate.. This plate has a 12 volt outlet, SWITCH, LIGHT and antenna connector, Normally it is near the main (Front) TV or near the antenna.

Second: A Sensar Pro, this has two digital displays, 3 buttons, and a column of LED lights with labels.

Finally, a Box of Many Buttons (Matrix Switch) BOMB for short.

The top one, Light must be on
The middle one, tap any button, and ONE of the led's should come on, if the digital displays light up as well good, if not touch the TOP button one time. and the digital displays should come on.

On the box of many buttons, the ANT button must be pressed Try pressing it again,, If that does not work turn OFF the power switch (oh, that has to be on as well) and then push buttons like 50 to 100 times at random alternating with the ANT button, then push ANT and turn power back on.

Beyond that we get to serious touble shooting.

have you tried to do a auto channel program in the tv mode for the front TV

My brother had much the same problem which he could not fix. On the front TV you had to put a 0 in front of the eight lower channels. Since you get one channel it could be this simple.